i'm mostly not much concerned regarding pickup of rear surrounds and i have been using many different mics (from the usual suspects) in various ways (pretty close and therefore easy to handle to very widely spaced and therefore less easy to handle) and with almost every pattern (from shotguns to omnis), all of which i found to be useful in certain situations.

quite often i'm using a l/c/r system as mains and any pair of spaced mic's for surround recording; surrounds can be positioned on the sides of the stage or at the far end of the venue - what approach i'm using is mostly determined by the availabe setup time and the soundfield i'm aiming for. double m/s, double ortf and soundfield are very easy to deploy. depending on system, monitoring on location can be a bit more tricky though (due to necessity of decoding)...